Datasheet

© Freudenberg Simrit GmbH & Co. KG | Technical Manual 2007588
Products I ISC O-Rings and Static Seals
Merkel Cover Seal PU 82
TPU profile ring
Merkel Cover Seal PU 82
Product description
Single-piece, double-acting compact seal made from
TPU for static sealing, inner sealing.
Product advantages
Interchangeable for O-ring housings and O-ring
with back-up ring
High reliability
Simple and secure installation
Simplified stockkeeping
Gas proofness.
Application
Higher operating pressure (up to 60 MPa)
Gap for breathing (pipe expansion)
Short rate of increase of the pressure
(end position damping)
Alternating in situ operating pressure
Nominal diameter up to 2000 mm.
Cranes, construction machinery, industrial vehicles,
forestry equipment, injection moulding machines,
presses, wind power plants.
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Material
Material Code
Polyurethane 95 AU V142/94 AU 925
Operating conditions
Material 95 V142/94 AU 925
Temperature range in °C
Hydraulic oils HL, HLP –30 … +110
HFA fluids +5 … +50
HFB fluids +5 … +50
HFC fluids –30 … +40
HFD fluids –
Water +5 … +40
HETG (rapeseed oil) –30 … +60
HEES (synthetic ester) –30 … +80
HEPG (glycol) –30 … +50
Mineral greases –30 … +110
Pressure p in MPa 60
The specified values are maximum values and must not be applied
simultaneously.
Surface quality
Surface
roughness
R
a
R
max
Sliding surface 0,8 µm 3,2 µm
Groove base 1,6 µm 6,3 µm
Groove flanks 6,3 µm 20,0 µm
Lead-in chamfer* 0,8 µm 3,2 µm
* burr-free transition